52 



Prof. H. A. Rowland on a 



Elements 



In Arc. 



In Sun. 



Kind 

 of 



Weight. 



Wave- 

 length 



Wave- 

 length 











Stand- 









Inten- 



Appear- 



Inten- 



Appear- 



In 



In 



in Arc. 



in Sun. 





sity. 



ance. 



sity. 



ance. 





Arc. 



Sun. 







Sr 



2 









M 



1 





2152-912 





Sr 



3 









M 



1 





2165-990 





Si 



2 









M 



2 





2208-06C 





Si 



3 









M 



2 





2210-939 





Si 



2 









M 



2 





2211-759 





Si ...... 



4 









M 



2 





2216-760 





Si 



2 









M 



2 





2218-146 





Al 



3 









M 



2 





2263-507 





Al 



4 









M 



2 





2269161 





Sr 



10 



K 







M 



1 





2275-376 





Ca 



20 



R 







M 



3 





2275-602 





Fe? ... 











M 



2 





2298-246 





Ba 



20 



R 







M 



1 





2304-364 





Ba 



20 



R 







M 



1 





2335-267 





Fe 











M 



2 





2343-571 





Fe 











M 



2 





2348-385 





Fe 











M 



2 





2364-897 





Al 



6 









M 



3 





2367-144 





Al 



7 









M 



3 





2373-213 





Fe 











M 



2 





2373771 





Fe? ... 











M 



3 





2382-122 





Fe 











M 



2 





2388-710 





Fe? ... 









... 



M 



3 





2395715 





Ca 



25 



R 







M 



5 





2398-667 





Fe 











M 



2 





2399-328 





Fe 











M 



2 





2404-971 





Fe 











M 



2 





2406-743 





Fe 











M 



2 





2410-604 





Si 



8 









M 



15 





2435-247 





Si 



3 









M 



10 





2438-864 





Si 



3 









M 



10 





2443-460 





Fe? ... 











M 



3 





2447-785 





Si 



3 









M 



10 





2452-219 





Fe? ... 











M 



3 





2457-680 





Fe 





... 







M 



3 





2462-743 





Fe 











M 



3 





2472-974 





C* 



10 









M 



15 





2478-661 





Fe 



... 





... 





M 



3 





2479-871 





Fe 





... 





.. . 



M 



3 





2483-359 





Fe 











M 



3 





2484-283 





Fe 











M 



3 





2488-238 





Fe 





... 







M 



3 





2489-838 





Fe 











M 



3 





2490-723 





Fe 











M 



3 





2491 -244 





Bo 



15 









M 



20 





2496-867 





Bo 



20 









M 



20 





2497-821 





Fe 











¥ 



3 





2501-223 





Si 



10 









M 



15 





2506-994 





Fe 











M 



3 





2510-934 





Si 



7 









M 



10 





2514-417 





Si 



15 









M 



7 





2516-210 





Fe 











M 



3 





2518-188 





* This line seems to be the only single line of carbon, not belonging to a 

 band in the arc spectrum. It was determined to belong to carbon by the spark 

 spectrum. (R.) 



